Detachable bearing head for cutter shafts and the like



Nov. 20, 1928.

C. L. MATTISON DETACHABLE BEARING HEAD FOR CUTTER SHAFTS AND THE LIKE Filed March 27, 1924 Patented Nov. 20, 1928A.

e UNITED jsIAIEs PATENT OFFICE. l

. CARI. LAWRENCE MA'rtrIsoN, or ROCKFORD, ILLINOIS, vnssIcfNoR To MA'rrIsoN'ivIA-` CHINE WORKS, or RocKroRn, ILLINOIS, A CORPORATION or ILLINOIS.

DETACHABLE BEARING HEAD FOR CUTTER SHAFTS AND THE LIKE.

Application filed March 27, 1924. Serial No. 702,194.

The invention pertains to bearing heads fory the cutter shafts of a moulding machine or the like, and the general object of the invention is to provide a construction permittingof the quick and easy removal of the head when itis desired to change cutters. Y

Dificulty has been'experienced with the bearingv head structures heretofore employed 'because when the shaft has a snug or tight 1o fit with the inner rotating bearing member, it is sometimes very hard to remove the head, and when the fit is madel loose enough so as to render the head readily removable, excessive vibration is permitted, resulting in a chattering of the cutter when in engagement with'the work. The object of my invention more specifically stated isto overcome these difficulties by the provision of a simple, quickly and easily operated means for releasably holding the end of the cutter shaft snugly in its bearing sleeve. f In the accompanying drawings:

Figure 1 is a fragmentary elevational view of a cutter shaft mounted in oppositely disposed bearing'heads, the cutter being shown diagrammatically in broken lines.

Fig. 2 is a fragmentary vertical sectional viewthrough the detachable cutter head.

Fig. 3 is a transverse sectional view taken Ysubstantially in the plane of line 3-3 of Fig.

2 but on an enlarged scale. l

Fig. 4c is `a fragmentary elevational View showing a detail of construction.

Fig. 5 is a similar view of the end of the cutter shaft.

For purposes of illustration I have shown a cutter shaft 7 mounted at one end in a fixed or stationary bearing head8 and at its other end in avdetachable head 9. 10 designates a 4o cutter of suitable type such as is employed in machines for forming picturemoulding and the like, it being common practice'to change the cutter when changing from one kind of work to another, such changing of cut-ters be- '45 ing accomplished by removing the head 9 from the Ashaft 7 and sliding the cutter 10 axially off the end ofthe shaft past the position normally occupied by the head 9. n

Said head 9 `is made hollow in construction inwardly extending annular flanges constiin to receive` a clampingserew 15 havingA a threadedengagement with the head and havmgl rigid withy its lower end aY clamping lever 16.

' rPhe hearing means 11 comprises an inner `bearing member or sleeve 17 which is adapted to be rigidly secured or clamped to the shaft 7 'and which is mounted for rotation in the head with a roller bearing 18 interposed be-l tween it and the head. As shown, thegsleeve 17 is arranged to bear at .opposite ends in two tuting bearing members 19 and 20, the inner member 19kbeing herein shown as provided with a bushing 2l. rlhe head is. preferably made in two sections 9 and-9b. The member 19 is formed integral with the section 9a and the member 20 is formed integral with the section 9b. The latter is cylindrical inform and arranged to fit within the outer `end of the section 9a, -being rigidly secured thereto as by means of screws 22. The ball bearing 18 is of ordinary construction, comprising inner and outer raceways 23 and 24 with balls 25 interposed therebetween. yThe innerv raceway is yrigidly secured to the bearing sleeve 17 between a iiange 26 on the sleeve and a lock nut 27 having a screw-threaded engagement with the sleeve. This nut may be of a Well known split type shown clearlyV in Fig. 4L.

The outerraceway 2li is held stationary. by being secured in the head Qbetween the sections 9@ and 9b thereof, an annular shoulder 28 being providedin the section 9L against which the raceway is held by the inner end ofthe vsection 9b abutting directly 'thereagainst The bearing sleeve 17, as will be understood, is intended to rotate with the shaft 7. At the same time, it is desirable, iny order to permit of the easy removal of the head,that

locking* means between the shaft and" theb sleeve. Thus in the present instance I make the end of the shaft of a diameter such that it normally fits loosely Within the sleeve 17,'

and I construct the end of the shaft so as to make it capa-lisible under the action of a suit able expanding means designated by the numeral 29. As herein shown, the said end of the shaft is reduced in diameter forming a shoulder 30 against Wlrifclr the sleeve 17 is arrlalnwed to abat..

the shafteapansible I form in its ear-t1*eine'` end aiplurality of longitudinal slots 31- spaced equidistantly about the circumference@ of the shaft,- four being herein shown; and centrali-y of the shaft I provide a' bore 32 oflfaager diameter at its cater end and internalflyA threaded to' receive a radial expander member 33.- Vfoward its inner end the bore SQ-tapers to forml a conical bearing surface Se w'v'i'ftl'if which the? conical inner end 35 of the memberl 33 is adapted to engage. The outer end ofthe member 33 is squared, as shown in Figl- 2', for' the' convenient application of a Wrench, and it vvi'l'l be seenthat by screwing the' member into the shaft, an eilzpansion of the latter' intoV clamping' engagement with the hearing. sleeve 17 is eected.

I-t will be apparent that Whenit is desired to` remove' the head 9, the lever 16 is operated tor'elease the head from the frame and the eirpan'ding! member 33 is turned to Withdraw its conical end 85 from engagement with the conical' bearing surface 34 of the bore 32. Because of the resiliency of the shaft, the outer end thereof immediately resumes its normal size whichv is' such as to permit the easy removal of the' bearing sleeve from the shaft with theV head1, the latter being provided With a suitable handle 36 for this purpose. It will also be noted that the construction provided avoidsV the necessity of using a clamping nut which must be removed before the head can be' detached. Indeed, it has been found that the member 33? need be given about a quarter of a turn only to effect the clamping and unclamping of the head relative to the shaft.

I claim as my invention l. In a machine of the character described, the Combination of a frame, a cutter shaft, a stationary bearing head for one end of the shaft adapted to support the shaft permanently on said frame for rotational and against longitudinal movement, a cutter carried on said shaft adapted to be slid oli' the other end thereof for removal from the machine, a bearing head for the saidother end of the shaft' slidab'le on said frame longitudinally of the shaft for disengagement from the shaft and removable from the machine to permit removal of the cutter, said head having a bearing sleeve rotatably mounted therein arranged to receive the said other end of the shaft, and means for effecting a connection betweenA the shaft and said sleeve adapted to centerthe shaft in"y the sleeve, i

In aniaehine of the character described, having` a base frame, a cutter arbor supported permanently thereon at one' end thereof' for rotational movement and a cutter head nor* mailly mounted on arbor andK adapted to be removed therefrom by movement olf the free end of the arbor, the combination of a removable bearing head for the other end of the arbor,` said bea/ring. head. being slidfable longitudinally ofthe arbor andA out off engagement with. the arbor to permit the reJ movall of the cutter' and comprising inner and oult'er bearing members,` a balli bearing intera posed between said` membersLinclud-ing. an; outer raceway' andl inner rac'evvay secured respectively to the outer' and' inner bearing:

members and means for. releasably locking* the sli-aft to the innerbearing. member;

. In a moulding machine or the like, the' contbinfrtion of a'fram'e, a cutter arbor, bearing means for one end of said. arbor adapted to mount said arbor. permanently onf said frame for rotational movement, a cutter head on said arbor' adapted to1 be slid olf the other end of. the arbor Vfor removali from the' machine, ai bearing head for the other endl of said arbor normally mounted on said frame and' arranged to= be' disconnected from' the frame and arbor for removal therefrom to permit the removal of the cutter., said bearing head including'. a sleeve aelapte'div to admit the free endofY said arbor, and meansto effect a quick. detachable ,connection between said arbor and said sleeve.

. il.a In a moulding machine or the like, in combination with ay frame, a cutter shaftpermanen'lly and rotatably mounted in said frame', a cutter carried on said shaft and removable therefrom by an. axial movement olf one' enel of the' shaft, of a removable bearing head for sai-d end of the shaft comprising inner and outer members and bearing means between said members, means operatively associated With one enel of saidA shaft to Vde- 'tachably secure the shaft to-s'aid inner bearnieinber, and means associated. with said frame to be detachablyseeu-resaid outer bearing member to the fra-me, said `djetaching means acting to permit removal of said bearing head as a unit from said frame and shaft lso as to permit removalof said cutter head from said shaft by moving said cutter along said shaft past the normal position of said bearing head. p Y' 5.` In a molding machine or the like, in combination, a base frame, apair of hearing; heads thereon, a spindle rotatably mounted in said bearing heads and carrying a cutting tool which is removable endwise olf one end of ating position providing` a quickly detachable the spindle, one of said bearing heads being connection therebetween, and bearing means slidably mounted on said base and removable in said removable head having a quick detach- -10 from the spindle in a direction axially off said able connection with said end of the shaft. 5 end of the spindle to permit removal of the In testimony whereof, I have hereunto afcutter, means for securing said removable fixed my signature.

bearing head to the framein its normal oper- CARL LAWRENCE MATTI'SON.V 

